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josh_ox_ribbon_synth

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@jordanaceto

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KiCad projectAll 165 files, ready to open in KiCad5.0 MB
For fabricationGerbers, drill, pick-and-place and BOMGerbers and drill zip1.2 MBGerbers and drill zip: ADSR_board421 KBGerbers and drill zip: ADSR_pcb_panel66 KBGerbers and drill zip: mains_transformer16 KBGerbers and drill zip: main_VCO_pcb_panel89 KBGerbers and drill zip: mod_osc_board316 KBGerbers and drill zip: mod_osc_pcb_panel39 KBGerbers and drill zip: power_supply217 KBGerbers and drill zip: protoboard_buffer26 KBGerbers and drill zip: ribbon_board1020 KBGerbers and drill zip: ribbon_pcb_panel51 KBGerbers and drill zip: sample_and_hold_board260 KBGerbers and drill zip: s_and_h_pcb_panel38 KBGerbers and drill zip: VCF_VCA_BBD_board1.0 MBGerbers and drill zip: VCF_VCA_BBD_pcb_panel94 KBPick and place (CSV)28 KBPick and place (CSV): ADSR_board9.9 KBPick and place (CSV): ADSR_pcb_panel124 BPick and place (CSV): mains_transformer35 BPick and place (CSV): main_VCO_pcb_panel125 BPick and place (CSV): mod_osc_board6.0 KBPick and place (CSV): mod_osc_pcb_panel125 BPick and place (CSV): power_supply3.2 KBPick and place (CSV): protoboard_buffer380 BPick and place (CSV): ribbon_board13 KBPick and place (CSV): ribbon_pcb_panel124 BPick and place (CSV): sample_and_hold_board5.9 KBPick and place (CSV): s_and_h_pcb_panel124 BPick and place (CSV): VCF_VCA_BBD_board19 KBPick and place (CSV): VCF_VCA_BBD_pcb_panel125 BBOM CSV75 KB
Schematic PDFEvery sheet, to read or print1020 KB
3D modelThe board with its parts, for an enclosure (GLB)3D model (GLB)1.8 MB3D model (GLB): ADSR_board14 MB3D model (GLB): main_VCO_pcb_panel769 KB3D model (GLB): mod_osc_board6.3 MB3D model (GLB): power_supply6.8 MB3D model (GLB): ribbon_board16 MB3D model (GLB): VCF_VCA_BBD_board1.8 MB
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README

josh_Ox_ribbon_synth

Ribbon synth for Josh Oxford

Main Features

  • Single VCO with two sub-oscillators
  • Transformer/diode based Ring Modulator
  • Dual State-Variable Filter
  • Bucket brigade Analog Delay with modulation
  • Envelope VCA
  • Volume VCA
  • Three ADSR's
  • Sample and Hold
  • Flexible gate control
  • Versatile Modulation Oscillator
  • Ribbon controller with quantizer

Status:

A complete synthesizer has been built with the current documents here. This instrument has been road tested on a few gigs. The current files represent a working instrument.

There are a few small PCB kludges required, and some potential future enhancements. See the github Issues and github Discussions for little things that could be improved and an idea of what may change in the future.

The synth is constructed with semi-independent PCBs and panels for the major circuit blocks, which allows for gradually upgrading the components over time.

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